/*
* MJPEG decoder
- * Copyright (c) 2000, 2001 Fabrice Bellard.
+ * Copyright (c) 2000, 2001 Fabrice Bellard
* Copyright (c) 2003 Alex Beregszaszi
* Copyright (c) 2003-2004 Michael Niedermayer
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file mjpegdec.h
+ * @file
* MJPEG decoder.
*/
-#ifndef MJPEGDEC_H
-#define MJPEGDEC_H
+#ifndef AVCODEC_MJPEGDEC_H
+#define AVCODEC_MJPEGDEC_H
+
+#include "libavutil/log.h"
+#include "libavutil/pixdesc.h"
#include "avcodec.h"
+#include "blockdsp.h"
+#include "get_bits.h"
+#include "hpeldsp.h"
+#include "idctdsp.h"
+
+#define MAX_COMPONENTS 4
+
+typedef struct MJpegDecodeContext {
+ AVClass *class;
+ AVCodecContext *avctx;
+ GetBitContext gb;
+
+ int start_code; /* current start code */
+ int buffer_size;
+ uint8_t *buffer;
+
+ int16_t quant_matrixes[4][64];
+ VLC vlcs[3][4];
+ int qscale[4]; ///< quantizer scale calculated from quant_matrixes
+
+ int org_height; /* size given at codec init */
+ int first_picture; /* true if decoding first picture */
+ int interlaced; /* true if interlaced */
+ int bottom_field; /* true if bottom field */
+ int lossless;
+ int ls;
+ int progressive;
+ int rgb;
+ int rct; /* standard rct */
+ int pegasus_rct; /* pegasus reversible colorspace transform */
+ int bits; /* bits per component */
+
+ int maxval;
+ int near; ///< near lossless bound (si 0 for lossless)
+ int t1,t2,t3;
+ int reset; ///< context halfing interval ?rename
+
+ int width, height;
+ int mb_width, mb_height;
+ int nb_components;
+ int block_stride[MAX_COMPONENTS];
+ int component_id[MAX_COMPONENTS];
+ int h_count[MAX_COMPONENTS]; /* horizontal and vertical count for each component */
+ int v_count[MAX_COMPONENTS];
+ int comp_index[MAX_COMPONENTS];
+ int dc_index[MAX_COMPONENTS];
+ int ac_index[MAX_COMPONENTS];
+ int nb_blocks[MAX_COMPONENTS];
+ int h_scount[MAX_COMPONENTS];
+ int v_scount[MAX_COMPONENTS];
+ int h_max, v_max; /* maximum h and v counts */
+ int quant_index[4]; /* quant table index for each component */
+ int last_dc[MAX_COMPONENTS]; /* last DEQUANTIZED dc (XXX: am I right to do that ?) */
+ AVFrame *picture; /* picture structure */
+ AVFrame *picture_ptr; /* pointer to picture structure */
+ int got_picture; ///< we found a SOF and picture is valid, too.
+ int linesize[MAX_COMPONENTS]; ///< linesize << interlaced
+ int8_t *qscale_table;
+ DECLARE_ALIGNED(16, int16_t, block)[64];
+ int16_t (*blocks[MAX_COMPONENTS])[64]; ///< intermediate sums (progressive mode)
+ uint8_t *last_nnz[MAX_COMPONENTS];
+ uint64_t coefs_finished[MAX_COMPONENTS]; ///< bitmask of which coefs have been completely decoded (progressive mode)
+ ScanTable scantable;
+ BlockDSPContext bdsp;
+ HpelDSPContext hdsp;
+ IDCTDSPContext idsp;
+
+ int restart_interval;
+ int restart_count;
+
+ int buggy_avid;
+ int cs_itu601;
+ int interlace_polarity;
+
+ int mjpb_skiptosod;
+
+ int cur_scan; /* current scan, used by JPEG-LS */
+ int flipped; /* true if picture is flipped */
+
+ uint16_t (*ljpeg_buffer)[4];
+ unsigned int ljpeg_buffer_size;
+
+ int extern_huff;
+
+ const AVPixFmtDescriptor *pix_desc;
+} MJpegDecodeContext;
int ff_mjpeg_decode_init(AVCodecContext *avctx);
int ff_mjpeg_decode_end(AVCodecContext *avctx);
int ff_mjpeg_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size);
+ void *data, int *got_frame,
+ AVPacket *avpkt);
int ff_mjpeg_decode_dqt(MJpegDecodeContext *s);
int ff_mjpeg_decode_dht(MJpegDecodeContext *s);
int ff_mjpeg_decode_sof(MJpegDecodeContext *s);
-int ff_mjpeg_decode_sos(MJpegDecodeContext *s);
+int ff_mjpeg_decode_sos(MJpegDecodeContext *s,
+ const uint8_t *mb_bitmask, const AVFrame *reference);
+int ff_mjpeg_find_marker(MJpegDecodeContext *s,
+ const uint8_t **buf_ptr, const uint8_t *buf_end,
+ const uint8_t **unescaped_buf_ptr, int *unescaped_buf_size);
-#endif /* MJPEGDEC_H */
+#endif /* AVCODEC_MJPEGDEC_H */
projects / ffmpeg / blobdiff